OneDrive as an application?

Lately OneDrive appears as one of the applications installed on my system; and the Windows Exprolorer lists it among the content of the system.
As shown there, it appears to contain a single file (or feature, maybe not a real file) with this name: .849C9593-D756-4E56-8D6E-42412F2A707B. Clicking on this just opens an empty Notebook and nothing else happens.

- How can I get rid of this application, as it seems quite useless, and I'm not aware of having installed it myself?
I cannot delete the file mentionned because a process keeps it open, a pop-up says.
I cannot uninstall OneDrive because that option is disabled on the list of applications.

- And what is this OneDrive application anyway? It doesn’t seem to be the same thing as OneDrive, the storage space in the cloud, which I use regularly, and performs all right.

Thanks for any help.
aca

Thank you, Brink. This is just what I needed to know about the overall working of OneDrive.
Most useful!
aca